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Finding the Fourth Proportional to 391,902.86, 584,600.89 and 378,783.65

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Solution

The fourth proportional to 391,902.86, 584,600.89 and 378,783.65 is: 565,030.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,902.86 : 584,600.89 = 378,783.65 : x
  2. Step 2: Convert to fraction form
    391,902.86/584,600.89 = 378,783.65/x
  3. Step 3: Cross multiply
    391,902.86x = 584,600.89 × 378,783.65
  4. Step 4: Simplify right side
    391,902.86x = 221,437,258,907.45
  5. Step 5: Solve for x
    x = 221,437,258,907.45/391,902.86
  6. Step 6: Final answer
    x = 565,030.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.